Oil governor for compressor engines



May 1, 1923; 1,453,681

J. W. JONES" OIL GOVERNOR FOR COMPRESSOR ENGINES Filed May 2'? 1922Sheets-Sheet 1 INVENTOR t mu 1) aoz mwafles HIS ATTORNE- May 1, 1923.-

J. W. JONES OIL GOVERNOR FOR COMPRESSOR E NGINES Fi led May 27 1922 5Sheets-Sheet 2 VINVENTOR rfodgvhI Zzl'one;

I I mlih H IS ATTO EY I II I l l l Ill lil Patented May 1, 1923.

1 UNITED STATES v I 1,453,681" PAr Nr ar JOSEPH W. JONES, OF CORNING,NEW YORK, ASSIGNOR TO INGERSOLL-EAND COMPANY, OF JERSEY CITY, NEWJERSEY, A CORPORATION OF NEW JERSEY.

OIL GOVERNOR, FOR COMPRESSOR.ENGINES.

Application filed May 27, 1922. Serial No. 564,101J

To all whom-it may concern:

Be it known that I, JOSEPH W. JoNEs, a citizen of the United States, anda resident of Corning, county of Steuben, State of 5 New York, haveinvented a. certain Oil Governor for Compressor Engines, of which thefollowing is a specification accompanied by drawings.

This invention relates to engine driven compressors, but moreparticularly to a discharge line pressure and speed controlled regulatorfor the engine, of the type disclosed in Letters Patent of the UnitedStates No. 1,278,160 granted to W. F. Trei- 1 her and myself onSeptember 10th, 1918 for governing mechanism for compressor engines. 3 I

In such a governor a chamber may be provided with a fluid actuatedplunger which is connected to an inlet valve of the en-r gine, a pumpresponsive tothe engine speed supplies fluid, as for instance oil, tothe plunger chamber, a by-pass pilot valve controls the supply of fluidto the chamber, means responsive to receiver or discharge line'pressureare connected to move the pilot valve in a direction to increase thesupply of fluid to the plunger chamber and thereby decrease the speed ofthe engine, and opposing stabilizing means actuated by theplungerare'connected to move the pilot valve in the opposite direction tending"to decrease the supplyof fluid to the plunger chamber andcheck themovement of the plunger untilthe engine speed again increases. In theabove mentioned patent a system of reducing levers, shown asacpantagraph, is connected between the plunger and the pilot Y valve. r40 The object of the present invention is to simplify the constructionabove briefly outlined and produce a governor operating on substantiallythe same principles, but cheaper to manufacture and having certainmechanical and operative advantages andfeatures of construction whichwill hereinafter appean' To all of these ends the invention consists ofthe combinations of elements and arrangement of parts having the generalmode of operation substantially as hereinafter fully described andclaimed inthis specification and shown in the accompanying drawings, inWhich-- Figure 1 is a top-plan view partly in and from each other tovary horizontal section of so much of a steam driven compressor havingmy governor ap plied thereto, as will-serve to illustrate the invention;

Figure 2 is a side elevation of the governor partly in vertical sectionthrough, the

pilot valve on the line 2-2 of Figure looking in the direction of thearrows;

Figure 3 is a side elevation of the governor partly invertical sectionthrough the plunger casing and pilot valve casing on the line 3-3 ofFigure 1 looking in the direction of the arrows;

Figure 4is an end elevation of the governor partly in vertical sectionthrough the pilot valve-and regulating mechanism on the line 44: ofFigure 1 or the line 44 of F igure 3 looking in the direction of thearrows,

. and

Figure 5 a" detail horizontal sectional top plan viewthrough thegovernor Qll'the line 5-5 of Figure 4, with the exception that themaximum speed screw is indicated conventionally for clearness, althoughthe line of section is actually taken at .a point below said maximumspeed screw.

Referring to the drawings, Figure 1 indicates diagrammatically,'the'high pressure side of a duplex steam driven compressor having myimproved governor applied thereto. To the engine bed orframe A areconnected the compressor cylinder B, and

the steam cylinder C having the piston D.

The steam cylinder C isprovided with-avalve'chest E having the inlet Fand-the exhaust outlet G. Av piston valveHop crates in the chest E andis carried bye-a valve rod J connected to the rod K- adapt (not shown)on the main shaft L of the machine.

red to be actuated by a suitable eccentric Variably movable auxiliarycut-off valves O and P are mounted within the piston valve H upon thevalve stem Q which is connected to the rod R adapted to be act-a uatedby another suitable. eccentric (not shown) on the main shaft L. Theauxiliary cut-off valves 0 and P as shown are carried onreverselythreaded portions of the valve stem Q, and said valve stein islongitudinally.- movable but also "rotatable so that rotation of thestem in one direction or the other moves the auxiliary cut-ofi' valvestowards v the cut-off. This portion of the machine is substantially likethat disclosed in the aforesaid Patent No. 1,278,160.

A governor of the type to which this invention relates automaticallyproportions the speed of the compressor to the demand for air by varyingthe position of the engine cut-oil valves. The governor is preferablylocated on the high pressure side of the compressor and includes an oilpump S, preferably of the gear type and conveniently driven from thecrank shaft L as by means of the chain T and sprockets U and V, fordelivering oil under pressure to a chamber W, preferably in the form oia cylinder, and containing a weighted plunger X, operatively connectedto control the cutofl' valves, as by means of the rack Y on the plungerand the pinion Z on the shaft at having the sprocket 6 connected by thechain c to the sprocket d on the valve stem (,3 which controls theauxiliary cut-off valves 0 and P. As the governor plunger X is forcedupwardly in the chamber W by increase of oil pressure, the sprocket bwill be rotated in a direction to separate the auxiliary cut-otl valves0 and P and thus decrease the supply of steam to the steam engine.

The admission of oil to the plunger chamber V is controlled by a bypasspilot valve 6, the position of which in its valve chest 7' is determinedby the relative position of the governor plunger X.

Stabilizing effects are obtained by means of suitable reducing eversconnecting the pilot valve 6 with the plunger X, and also with an airactuated weighted lever g pivoted at It on the bracket 7'. When thecompressor speed is such as to create sufficient oil pressure to forcethe plunger outwardly in its chamber 7, the pilot valve 6 will open andprevent further lifting of the plunger X until another increase of speedoccurs.

I have found that a suitable and sensitive air controlled device foractuating the weighted lever 9 may consist of a sylphon comprising a cupand associated parts suitably supported on the cover plate 0 olthe'casing 7; containing the by-pass pilot valve 6 and the pump S. Asylphon in the usual form of an expansible and contractable corrugatedcylinder is supported within the cup is, and a pointed, pin 9 carried ina socket a bears underneath the weight ed lever g. The sylphon issubject to receiver pressure or in this instance is sub ject todischarge line pressure and is connected to the discharge line t as bymeans of the pipe '21 which leads to the bottom of the sylphon. Increaseotf discharge line pressure will cause the sylphon to expand and movethe weighted lever g upwardly.

The valve stem *0 of the bv-pass pilot valve 6 is pivotally connected atthe point 'w to a stabilizing lever m which in turn is fulcrumed on apin y carried by the weighted lever g. A link 2 pivotally connects theouter end of the stabilizing lever :12 to one arm 2 of the bell cranklever 3 pivoted at 4 to the bracket 5 and having its other arm 6extending opposite a transversely slidab'le pin 7 movable in the wall ofthe chamber FF and extending into a tapered groove 8 in the side of theplunger X. From the construction so far described, it will be obviousthat the upward movement oi the pilot valve 6 due to the upward movementof the weighted lever 9 will be opposed and compensated for by theupward movement of the plunger X, because as the transversely movablepin 7 is forced out wardly by the tapered groove or cam surface 8 on theplunger X, the bell crank lever 23 will be rocked in a direction tomovethe stabilizing valve lever 00 downwardly. The object 0t thisconstruction'is to bring. the speed of the compressor'back to ani-nternediate point. Theweighted lever 9 may be provided with anadjusting spring 1) tor close adjustment and a'mini-mum speed screw 10acting as a stop for the shorter end of the lever g which limits themovement of said lever andprevents the valve 0 om being entirely closed.

in the operation of the pump S, oil ill 7 pumped from the pump chamberhaving the a rotary gears 12, only one of which is shown, and the oil isconducted through the pipe 12-5 to the compartment let in the valve casing the apertures 15 in the valve cage 16, and with the valve in theposition shown in Fig ures 2 and 4, the oil may pass out through theapertures 17 and 18 in the valve cage" 16 to: the oil discharge chamber19 and.

thence through the aperture 20 controlled by the maximum speed screw orvalve 21 to,

the space 22 in the casing and back to the oil pump through the oilinletaperture In this way there' is a, continual bypass and flow of'oil fromthe pump through the val e chamber and back.

in the pump casing.

to the pump, and this How is controlled-by the pilot valve 6 due to thecooperation between the valve heads on the valve and the valve seatsprovided 'onthe valve cage, 16.

From thence the oil passes in through;

screw 21 is screwed outwardly and for aslower maximum speed the screw isturned inwardly in order to throttlethe opening 20.

The operation of the device is like that described for the devicedisclosed in the above mentioned patent, but I am not to be understoodas limiting my invention to the precise form and details of constructionshown in the accompanying drawings and described in thisspecification,except as defined in the appended claims, because those skilled in theart to which this invention relates may devise equivalent deviceswithout departing from the spirit of my invention.

I claim:

1. In an engine driven compressor, a discharge line pressure and speedcontrolled regulator, comprising a chamber, a fluid actuated plungertherein connected to an inlet valve of the engine, a pump responsive tothe engine speed for supplying fluid to said chamber, a by-pass pilotvalve for controlling the supply of fluid to said chamber, meansresponsive to discharge line pressure for moving said pilot valve in adirection to increase the supply of fluid to the plunger chamber, andopposing means actuated by the plunger, and including a cam and 01-lower, operatively connected to move said pilot valve in the oppositedirection tending to decrease the supply of fluid to the plungerchamber.

2. In an engine driven compressor, a discharge line pressure and speedcontrolled regulator, comprising a chamber, a fluid actuated plungertherein connected to an inlet valve of the engine, a pump responsive tothe engine speed for supplying fluid to said i chamber, a b-y-pass pilotvalve for controlling the supply of fluid to said chamber,

means responsive to discharge line pressure for moving said pilot valvein a direction to increase the supply of fluid to the plun er regulator,comprising a chamber, a fluid actuated plunger therein connected to aninlet valve of the engine, a pump responsive: to the engine speed forsupplying fluidto said chamber, a bypass pilot valve for controlling thesupply'of fluid to said chamber, means responsive to discharge linepressure for moving said pilot valve in a direction to increase thesupply of fluid to the plunger chamber, and opposing means actuated bythe plunger and including a longi tudinally tapered groove on theplunger forming a cam surface and a movable pin cooperating with saidgroove and operatively connected to move said pilot valve in theopposite directiontending to decrease the supply of fluid to'the plungerchamber.

In testimony whereof I have signed this specification.

' JOSEPH W. JONES.

